if humans are animals why do we not support the preservation of racial habitats?

environmentalists want to preserve different species of deers that are native to different environments (sure you can say all the variations of deers are roughly the same but people still want to preserve the uniqueness of each species) so why is it wrong to want to preserve different ethnicities of humans that are native to different environments?

Some ethnicities (your ethnicity is the language and culture you were raised in) do more or less have their own territory, but unfortunately many of the world's over 7000 ethnicities do not, and plenty of them are being suppressed by the local dominant culture